Name: alpha channel

Synonyms: alpha channel, transparency channel

Type: glossary

Description:
A set of values, or <channel>, that encodes transparency information for
an <image>.

Each <pixel> in the <image> has a number that specifies how transparent
it is. An <image|image's> alpha channel consists of the transparency
numbers for all the <pixel|pixels> in the <image>.

References: image (glossary), pixel (glossary), channel (glossary)

Tags: ui

